Blackhearted, if global lights don't cast any light, then what's the point of them being there? Yes, I've had that all black effect happen, too. It's totally annoying. f you get too many lights on that sphere up there, it's murder trying to adjust the ones you want to change. There are so many of them, you can't find the one you want. I just delete each unwanted light manually. It takes some time, but eventually you clean them all out and you can start over. Melanie